Manholes are essential components of any property’s sewerage system, allowing access to pipe networks for inspection, cleaning and maintenance. However, it is common over time, especially in older properties or after renovations, for manholes to become hidden under paving, grass or even buildings. Finding a hidden manhole can be a challenge, but it is necessary to avoid major problems such as blockages or leaks. In this guide, we show you practical methods for locating a hidden manhole in your property.
Review property plans and documents
The first step in finding a concealed manhole is to check any plans or construction documents available to you. Sanitation plans often indicate the approximate location of manholes. If you have recently purchased the property, the builder’s or previous owner’s documents may contain this information. In older properties, plans may not be accurate or available, which will require more direct methods of searching.
Visual inspection and manual search
If plans are not available or accurate, you can start with a visual inspection:
- Look for depressions or sunken areas in the ground: Hidden manholes can cause depressions in the lawn or pavement due to the weight or pressure of the surrounding soil.
- Identify visible access points: Check around exterior walls and paved areas, where drainage systems are often located.
- Use a metal rod or probe: This traditional method involves inserting a rod or probe into the ground and listening for the hollow sound that might indicate the presence of a manhole.
Technical methods for the detection of concealed manholes
When manual methods are not enough, it is time to turn to more advanced technologies:
- Geo-radar: Geo-radar is a non-invasive technique that uses electromagnetic waves to detect underground structures. It is especially useful for locating manholes hidden under concrete or pavement without the need to break the ground.
- Electromagnetic Detection: This technique consists of using a device that emits electromagnetic signals to identify metallic objects or changes in the subsoil that could indicate the location of a manhole.
- Inspection Cameras: If you have access to the pipes from another point, inspection cameras can help you to follow the pipe route to locate the manhole.
When to contact a professional
While some methods can be done on your own, it is often safer and more effective to enlist the help of professionals to locate a hidden manhole. Manhole detection experts have the equipment and expertise to find manholes without damaging your property.
If you have tried the above methods without success or if you prefer a guaranteed solution, at Limpiezas Domingo we offer specialised services in the detection of hidden manholes. We use advanced technologies such as georradar and electromagnetic inspection equipment to locate manholes quickly and without the need for invasive works.
Prevention: Preventing the loss of manhole locations
Once you have located the hidden manhole, it is important to take measures to ensure that it does not get lost again:
- Mark the location: Use visible markers or references on the ground to remember the exact location.
- Record the location: Update your property plans with the precise location of the manhole for future reference.
- Regular maintenance: Carry out regular inspections to ensure that the manhole is accessible and in good condition.
In conclusion, finding a hidden manhole may seem like a challenge, but with the right tools and techniques, it is a manageable task. Whether using manual methods or advanced technologies, it is crucial to locate these manholes in order to keep the sanitation system in optimal condition.
If you prefer to leave this task in the hands of experts, do not hesitate to contact Limpiezas Domingo. Our hidden manhole detection services are designed to offer you the most efficient and effective solution, without the need for invasive work on your property.
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